package ch05.ex52.ex512;

public class Example5_12 {
    public static void main(String[] args) {
        GirlFriend girl=new ChinaGirlFriend();
        Boy boy=new Boy();
        boy.setGirlfriend(girl);
        boy.showGirlFriend();
        girl=new AmericanGirlFriend();
        boy.setGirlfriend(girl);
        boy.showGirlFriend();
    }
}
